I'm getting ready to DM a Forgotten Realms campaign against the Wall, but I'm not sure if I have all the information I could have.
This will be a sequel to the last campaign we had, where one of the characters managed to get most of the others interested in joining him in a crusade as soon as the preparations are complete; the player in question got the idea after playing a game called Mask of the Betrayer.
Now, I haven't played this game but plan on watching a playthrough of it, but I'm wondering if there's any more information in a book or a supplement or something that I could read; the more info I have on it the better prepared I'll be.
This will be a D&D 3.5e campaign, so anything specific to 4e or later won't be of use to me. Aside from that, though, anything you could find will be greatly appreciated.
Here are some links about the Wall of the Faithless: NWN2 Wiki and FR Wiki
I've read a lot of game books and novels set in the FR, but not much is mentioned about the WotF. The only place where it plays a major role is the game expansion Neverwinter Nights 2: Mask of the Betrayer